Half-Life 2 (2004)

The gravity gun makes loose objects part of a fight, while vehicles, physical puzzles and stretches of environmental storytelling keep the journey changing shape. Its campaign remains compelling because the world teaches you new interactions without turning every room into the same arena. Some driving stretches feel long, and the presentation is older. The current Steam version also incorporates Episode One and Episode Two; those continuations extend the journey, rather than being three copies of the same campaign.